Home / 289,490,982.09-399,500,641.33-157,331,985.44

Finding the Fourth Proportional to 289,490,982.09, 399,500,641.33 and 157,331,985.44

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Solution

The fourth proportional to 289,490,982.09, 399,500,641.33 and 157,331,985.44 is: 217,119,817.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,490,982.09 : 399,500,641.33 = 157,331,985.44 : x
  2. Step 2: Convert to fraction form
    289,490,982.09/399,500,641.33 = 157,331,985.44/x
  3. Step 3: Cross multiply
    289,490,982.09x = 399,500,641.33 × 157,331,985.44
  4. Step 4: Simplify right side
    289,490,982.09x = 62,854,229,085,744,776
  5. Step 5: Solve for x
    x = 62,854,229,085,744,776/289,490,982.09
  6. Step 6: Final answer
    x = 217,119,817.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.